API Std 603-2025 耐腐蚀栓接阀盖闸阀 – 法兰端和对焊端第十版

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API STANDARD 603

TENTH EDITION, JULY 2025

API MONOGRAM PROGRAM EFFECTIVE DATE: FEBRUARY 1, 2026

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No reproduction or networking permitted without license from Accuris

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Foreword

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标签： #腐蚀 #法兰 #阀

摘要：

API Std 603-2025 是《耐腐蚀栓接阀盖闸阀 – 法兰端和对焊端》的第十版标准，适用于化工、石油、天然气及海洋工程等腐蚀性介质管道的阀门设计与制造。该标准由美国石油协会（API）发布，规定了公称尺寸范围、压力等级、材料选择、端部连接型式（法兰端和对焊端）以及栓接阀盖结构的具体要求。第十版在原有基础上更新了材料规范、试验方法和密封性能标准，确保阀门在高温、高压及强腐蚀工况下具备更高的可靠性与使用寿命。该标准适用于碳钢、合金钢及不锈钢材质的闸阀，强调阀盖与阀体之间的螺栓连接结构，便于维修

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